cpuset: update MAINTAINERS

As Paul doesn't maintain cpusets anymore, I'll take over the
maintainership.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

MAINTAINERS

@@ -2128,10 +2128,10 @@ S:	Maintained
 F:	tools/power/cpupower
 
 CPUSETS
-M:	Paul Menage <paul@paulmenage.org>
+M:	Li Zefan <lizefan@huawei.com>
 W:	http://www.bullopensource.org/cpuset/
 W:	http://oss.sgi.com/projects/cpusets/
-S:	Supported
+S:	Maintained
 F:	Documentation/cgroups/cpusets.txt
 F:	include/linux/cpuset.h
 F:	kernel/cpuset.c